ATMEGA16-16PC datasheet(50/315 Pages) ATMEL

Part #	ATMEGA16-16PC

Description	8-bit AVR Microcontroller with 16K Bytes In-System Programmable Flash

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Manufacturer	ATMEL [ATMEL Corporation]

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ATmega16(L)

2466E–AVR–10/02

succeeding positive clock edge. As indicated by the two arrows t

pd,max and tpd,min, a

single signal transition on the pin will be delayed between ½ and 1½ system clock

period depending upon the time of assertion.

When reading back a software assigned pin value, a nop instruction must be inserted as

indicated in Figure 25. The out instruction sets the “SYNC LATCH” signal at the positive

edge of the clock. In this case, the delay t

pd through the synchronizer is one system

clock period.

Figure 25. Synchronization when Reading a Software Assigned Pin Value

nop

in r17, PINx

0xFF

0x00

0xFF

tpd

out PORTx, r16

SYSTEM CLK

r16

INSTRUCTIONS

SYNC LATCH

PINxn

r17

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